Drive gearing



Mam .M, 1927.

A. FONDEWLA DRIVE GEARING Filed Oct.

19, 1925 2 Sheets-Sheet l Jimm 14,, 92?

A. FONDEVILA DRIVE GEARLNG Filed Oct.

19, 1925 2 Sheets-Sheet 9 .r/i ffozzazevza/ Patented, June 14, 1927.

, UNITED STAT ES PATENT OFFICE.-

ANTONIO FONTDEVILA, or oIIIcAGo, ILLINoIs.

DRIVE GEARING.

Application filed October 19, 1925. serial No. 3,381.

A still further object of the invention is to make it a self-contained reduction unit to which the powersource may be applied through high speed connections.

Another object of the lnvention is to provide a gearing of the type suggested which;

is shock absorbing, translating impulsive or uneven power delivery into continuous and smooth operation of the driven element. With the above objects in view, and any others which may suggest themselves from the description and claims to follow, a better understanding of the invention may be had by reference to the accompanying idrawings, in which Figure 1 is a plan view of a-vehicle 1ncorporating the novel gearing, partly broken away;

Figs. 2 and 3 are sections on the lines 2-2 and 3-3, respectively of Fig; 1; i Fig. 4 is a cross-section of a double sprocket-wheel assembly;

Fig. 5 is a similar view of a comblned gear and sprocket-wheel assembly; and

Fig. 6 is a perspective view of an idler support.

Referring specifically to the drawings, 10 denotes a typical base frame for a vehicle, 11 the-rear wheels and 12 the front wheels. To provide support for the frame, an axle 13 is carried by truss plates 14 at the sides of. the frame, the axle having trunnions passing loosely into-the wheel hubs. By means of suitable springs, such as shown at 15, a body frame 16 i s resiliently carried by the base frame 10. The latter has suitable reinforcing members 10, and the frame 16 also has a' suitable arrangement of cross members 16 for this purpose, as well as to form a support for a vehicle body. In the present showing the vehicle is designed to operate by electricity, and the position of the batteries for this purpose has been indicated by dotted lines at 17 The structure outlined above is used in the present connection merely for illustrative purposes, and

gearing which 1s a unit with thehas no novelty in a patentable sense. The structure is typical of power-driven vehicles in general, and its design and the character of its power plant may, with the use of the novel gearing, be varied in many wayswithoutlosing its applicabilityto the gearing.

In the showing outlined, the wheels 11 are carried loosely on the axle trunnions, and it is intendedthat they be driven by a motor 18 throughthe novel gearing. The motor is secured on the base frame 10 and provided with shaft extensions 19 leading to the wheels, one of these sections operating through the agency of a standard dlfierentlal gearing, whose position is denoted at 20,

to conform to the practice usually followed in this respect.

As the-novel gearing is designed and applied alike in relation to each wheel 11, it will sufiice-if but one unit is described. Each motor shaft extension 19 receives a sprocketwheel 21 before it lodges with its outer end in a bearing 22 carried by the corresponding truss plate 14. The latter also carries a sprocket-wheel 23 at a high point and a double sprocket-wheel 2 125 at a low point, these sprocket-wheels carrying a chain 26 in a plane adjacent to the sprocket-wheel 21, so that the latter mesheswith the chain from the'outside and therefore drives the same,

the sprocket-wheels23 and .24 -25 merely acting as guides or idlers therefor.

That run of the chain 26 which is remote from the sprocket-wheel 21 is intended -to transmit the motion of the chain to a large double sprocket-wheel 2728 by peripheral meshing therewith, as in the instance of the sprocket-wheel 2121s shown. in Figure 2. By double sprocket-wheels it is meant that the sprocket-wheels 24 25 and 27-28 each have two rows of teeth abreast; and for the present purpose the inner teeth, namely 24 and 27 are operatively connected; by the chain 26.

The wheel 11 receives its motion through an internally-toothed ring 29 carried from the wheel by brackets 30 or other suitable means As shown in Figure 3, two pinions 31 in tandem order are provided to mesh with the ring 29, the spindles 3150f the pinions being journaled in bearings 32 outwardly formed from the truss plate 14.

These bearings are continued on the inner these in forward direction and down around the teeth 27 of the double sprocket-wheel 27-28, continuing over onto theteeth 24 of the double sprocket-wheel 2 l-25 and down along the rear thereof. Thechain now extends in a forward direction around anidler sprocket-wheel 35, up alongside a sprocketwheel 36'positioned along the outer side 01 the sprocket-wheel 27-23 and finally to the point of'it's origin about the rear sprocket-c wheel 33. This completes the course of the chain 34. V l

The design of the double sprocket-wheel 24-945 is shown more clearly in Figure 4. It is seen that the truss plate 1-dcarries a tired drum or hub onwhich the sprocketwheel is mounted through the agency of a ball bearing 36. i

The structure of the double sprockct wheel' 2728 is illustrated in Figure 5. Here it is evident that the sprocket-wheel revoluble through a ball bearing 37 on' the neck 33 which constitutes a reduction of the sprocketwheel 36. On the inner side of the sprocketwheel 27-28 the neck 33 is enlarged to form a spur gear 39. The integral assembly of the sprocketwl1eel 36, neck 38 and gear 39 is journaled on a fixed shaft 40 carried by and extending outwardly from the side beam of the body frame 16. The sprocket-wheel 27-28 is recessed opposite the spur gear 39 to form an internal gear l1, and a connection between the latter and the spur gear 39 is formed by the interposition of a pinion r 42, this pinion also being carried by the frame beam, as indicated in Figure 2.

The idler sprocket-wheel 35 is hung on a spring arm -13 which is secured to and pro jects from the side beam of the base frame 10. The function of this idler is of course to take up slack in the chain 34:.

llith the component elements of the above gearing properly balanced as to ratio, it will be evident that the initial or high speed of the motor shaft 19 will be transmitted to the wheel through a reduction gearing which'not only runs easily on its ball bearings but is also flexible and shock-absorbing both as-to uneven power impulses and road shocks received by the vehicle. The use of the chains lends a powerful influence upon the parts affected and. avoids the grinding noise usually present when gears alone are used. .llt

' will be noted that the chain 34 is so trained I farm vehicles and the like.

as to absorb variations in the spacing of the two vehicle frames from road vibration, this feature being evidenced in the oblique direction of the chain-runs from the sprocket wheels 33 and in the provision. of the idler 35.

The novel gearing thus requires but little power to actuate it, and should be ofvaluable service ;tor driving railway yard trucks, lit should be understood that the present illustrations are but indicative of the principle involved in the without the exercise of invention, in orderthat a practical result may be attained.

LA drive gearing for a vehicle wheel comprising av drive sprocket, a gear carried by the vehicle wheel, a pinion assembly ap plied to said gear, a sprocketwheel assembly carried. by the pinion-assembly, an intermediate sprocket-wheel assembly, a chain drive between the drive sprocket and the'intermediate sprocket-wheel assembly, a chain drive between the latter and first mentioned sprocket-wheel assembly, and a regulating sprocket-wheel associated with said last mentioned chain drive and geared to the intermediate sprocket-wheel assembly,

2. A drive gearing for a vehicle having a baseframe' carrying a power source and traction wheel, and a body frame resiliently supported by the base frame, comprising: a power-driven sprocket-wheel carried by the base frame, a gear carried by the wheel, a pinion-assembly carried by the base frame and applied to said gear, a sprocket-wheel assembly carried by the pinion-assembly, an intermediate sprocket-wheel assembly carried by the body frame, a chain drive carried by the, base frame and connecting the power-driven sproclret-wheeland the intermediate sprocket-wheel assei bly, and a chain drive between the'la-tter and the first mentioned sprocket-wheel assembly.

3. A drive gearing for a vehicle wheel comprising a power-driven sprocket-wheel, a gear carried by the vehicle wheel, a pinion assembly applied to said gear, a sprocketwheel assembly carried by the pinion-assembly, a drive chain between said powerdriven so j sprocket-wheel and said sprocket-wheel assembly, an intermediate sprocket-wheel, 0perated by the drive of said sprocket-wheel assembly, a secondary spro el et-wheel axial of and reversely geared to the intermediate sprocket-wheel, and a chain trained over the several sprocket-wheel whereby to operate the intermediate sprocket-wheel and said sprocket-wheel assembly in one direction and the secondary sprocket-wheel and the pow er-driven sprocket-wheel in the opposite direction.

. 4. A drive gearing for a vehicle wheel comprising a twin sprocket-wheel having a chain drive to one section from a power source, a gear carried by the vehicle wheel, a pinion assembly applied to said gear, a sprocketwvheel assembly carried by said pinion-assembly, a twin intermediate sprocketwheel with one section operated by the chain drive to said sprocket-wheel section, a secondary sprocket-wheel axial oil? and reverse'ly geared to the intermediate sprocket-wheel,

and a chain trained over the other section of the twin sprocket-wheel, the other section of the intermediate sprocket-wheel and said sprocket-Wheel assembly whereby to operate the intermediate sprocket-wheel and said sprocket-wheel assembly in one direction and the secondary sprocket-wheel andthe power-driven sprocket-wheel in the opp0-- site direction. v

5. A drive gearing for a vehicle wheel comprising a' twin sprocket-wheel having a chain drive to one section from a power source, a gear carried by the vehicle wheel,

a pinion assembly applied to said gear, a

I sprocket-wheel, the other section of the intermediate s rocket-wheel and said sprocketwheel assem 1y whereby to operate the intermediate sprocket-wheel and said sprocketwheel amembly in one direction and the secondary sprocket-wheel and the power-driven sprocket-wheel in the opposite direction.

6. A drive gearing for a vehicle wheel comprising a chain drive to one section of a twin sprocket-wheel, a second twin sprocket: wheel having one section in gear wlth said chain drive, a sprocket-wheel assembly geared to the vehicle wheel, a sprocket-wheel reversely geared to the second twin sprocketwheel, and a chain looped over the other sections of the twin sprocket-wheel and second twin sprocket-wheel, over the sprocket' wheel, and over the sprocket-wheel assembly whereby to operate the twin sprocketwheel in the direction of the sprocket-wheel and the sprocket-wheel assembly in the direction of the second twin sprockebwheel. In testimony whereof I afiix my signature.

ANTONIO FQNDEVILA. 

